diff --git a/python/host.json b/python/host.json
index 8b8b083..1e39325 100644
--- a/python/host.json
+++ b/python/host.json
@@ -2,7 +2,7 @@
   "version": "2.0",
   "extensionBundle": {
     "id": "Microsoft.Azure.Functions.ExtensionBundle",
-    "version": "[2.*, 3.0.0)"
+    "version": "[4.0.0, 5.0.0)"
   },
   "extensions": {
     "http": {
@@ -31,4 +31,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}